Cheapest priced copy (Eldritch Moon): $0.35 at Card Kingdom, near mint, their price list as of .
Tangleclaw Werewolf // Fibrous Entangler 
Creature — Werewolf Horror // Creature — Eldrazi Werewolf · 2/4 · Uncommon · Eldritch Moon · #174
This creature can block an additional creature each combat.
{6}{G}: Transform this creature.
Vigilance
This creature must be blocked if able.
This creature can block an additional creature each combat.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Eldritch Moon | 174 | Uncommon | $0.35 | $0.49 |
4 rulings from Wizards of the Coast
- 13 July 2016The defending player, not you, chooses which creature blocks Fibrous Entangler.
- 13 July 2016Only one creature is required to block Fibrous Entangler. Other creatures may also block it, and are free to block other creatures or not block at all.
- 13 July 2016If Tangleclaw Werewolf transforms into Fibrous Entangler while it's attacking, having vigilance won't cause it to become untapped.
- 13 July 2016If each creature that could block Fibrous Entangler is tapped or is affected by a spell or ability that says it can't block, then none of them block. If there's a cost associated with having each of those creatures block, its controller isn't forced to pay the cost, so they don't have to block in that case either.